Integra Tools SIX PACK of High Quality Sharpener Burrs made for superior durability. . Integra Tools chainsaw diamond sharpener burrs will outperform most and provide a longer sharpener cutting edge at 1-1/4". . Designed to fit most rotary tools. . Features: . Quantity: 6 Burrs Total length: 2-1/2" Cutting edge length: 1-1/4" Shank Diameter: 1/8" Burr diameter: 3/16" Grit: 120-150